Study On The Effect Of Feeding Mode Of Discrete Element Based Sieving Crusher On Crushing Performance Of Double-tooth Roller

In the 1960 s,the self-moving crushing station of large-scale mining machinery equipment has been gradually developed.In the self-moving crushing station,the sieving crusher is one of its main core equipment.In the design and development of two-tooth roller of sieving crusher,more attention is paid to the influence of material and strength on the service life of the tooth roller.The research and development and optimization of sieving crusher need a lot of experimental data to support,but due to the lack of effective research means and detection equipment,the entity research and development cycle is long,the cost is large,and the timeliness is low.Paper type SSC1150 graded crusher as research background,using the discrete element method and simulation method of response surface method,the graded crusher in different feeding height(A),feeding speed(B),feeding position(C)and gear roll speed(D),and other conditions of the working process of the effect on the properties of graded crusher double toothed roll breakage,feeding mode is analyzed and different combination of graded crusher toothed roller broken tooth wear(MAX),the equivalent stress(MAX)effects,the graded crusher optimization design of double toothed roll and provide reference for field application.The main problems and research conclusions of this paper are as follows.(1)Simulation results show that the input load position of the crushing tooth is in the middle and upper part of the crushing edge before the crushing tooth,and the equivalent stress at the root of the front crushing edge is non-uniform under the action of material load.The displacement of broken teeth mainly occurs at the top of broken teeth,in front of the tip and at the top of the front edge.Among them,the top displacement of the crushing edge and the top displacement of the front crushing edge are more obvious.The maximum displacement of the crushing edge and the top of the front crushing edge on the top of the crushing tooth surface is 0.000495 mm,and the displacement is very small,indicating that the material performance of the crushing tooth is good and the structure design is reasonable.The tangential energy accumulation of the broken teeth is mainly distributed on the cusp of the broken teeth near the front of the broken teeth.The normal energy accumulation of the broken teeth is mainly distributed on the side of the broken teeth,and the distribution is non-uniform.(2)Response surface analysis shows that the feed height has A significant influence on the wear(MAX)of the two-tooth roller of the sieving crusher.The significant order of the influence of each factor on the wear(MAX)is A>B>D>C,and the significant order of the interaction of each factor is BD>AB>CD>AD>BC>AC.The feeding speed has A significant effect on the equivalent stress(MAX)of the double-teeth roller of the sieving crusher.The significant order of the interaction of the influencing factors is B>D>A>C,and the significant order of the interaction of the influencing factors is AD>AB>AC>CD>BD>BC.(3)The fitting regression equation model between the wear(MAX),the equivalent stress(MAX)and the influencing factors was established,and the optimal value of wear(MAX)and the equivalent stress(MAX)was predicted by the wish function of the response surface analysis software.The optimal combination of reducing wear and reducing equivalent stress given by the wish function optimization is as follows: the feed height is 1.77 m,the feed speed is 4.12 m /s,the gear roll speed is 79.68 r /min,and the blanking position is 0.677 m.Feed height is 2.17 m,feed speed is 4.31 m /s,gear roll speed is 66.80 r /min,blanking position is 1.029 m.